I make a little over 30K a year, can I afford a $300 car note?

My rent is $633 a month. My insurance will be over 150 dollars easy (I'm 21). I spend $50 on Cell and $55 Internet/Cable combined. I've done the math, but I wanted to get some thoughts from the peanut gallery.

What do you think?

I live alone, but I'm getting a roomie in a few months so that's great. Thoughts?